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  • 1
    Digitale Medien
    Digitale Medien
    Platelet superoxide dismutase in migraine and tension-type headache (1994)
    USA/Oxford, UK : American Association for the Study of Headache/Blackwell Science Ltd
    Cephalalgia 14 (1994), S. 0 
    Details
    ISSN: 1468-2982
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: Superoxide dismutase (SOD) is a radical-scavenging enzyme. We determined Cu, Zn-SOD concentrations and activities in platelets from subjects with migraine and tension-type headaches. Thirty migraine without aura (MWoA) patients, 9 migraine with aura (MWA) patients, and 53 tension-type headache patients were selected for study. Thirty healthy volunteers composed the control group. Concentrations of platelet SOD were determined using enzyme-linked immunosorbent assay techniques. The activity of platelet SOD was determined by measuring reductivity of nitroblue tetrazolium. Low concentrations of platelet SOD were found in patients with MWA and MWoA. Platelet SOD activity decreased in MWA patients but not in patients with MWoA or tension-type headaches. These findings suggest vulnerability to oxidative stress in patients with migraine. It is suggested that low platelet SOD levels may play an important role in the etiology of migraine.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1046/j.1468-2982.1994.014003215.x
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  • 2
    Digitale Medien
    Digitale Medien
    Glutathione Peroxidase of Fish (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 57 (1992), S. 0 
    Details
    ISSN: 1750-3841
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Notizen: Glutathione peroxidase (GSH-Px) activity was detected in the muscle and skin tissues from several fish species. The muscle GSH-Px showed an optimum pH at 8.0 for salmon and 8.5 for carp. Stability of salmon muscle enzyme was enhanced in the presence of reduced glutathione (GSH), but considerably decreased in the presence of tert-butylhydroperoxide. When salmon fillets were stored at -50°C, the GSH-Px activity increased gradually during storage. Fish muscle GSH-Px shows potential for preventing oxidative deterioration in muscle during storage and processing.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1365-2621.1992.tb11276.x
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  • 3
    Digitale Medien
    Digitale Medien
    Superoxide dismutasc activity in lite skin of fish (1993)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 43 (1993), S. 0 
    Details
    ISSN: 1095-8649
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Biologie
    Notizen: Superoxide dismutase (SOD) activity in the skin of fish was observed to be higher in the dark than in the light parts. SOD activities in both parts were confirmed by visualisation of SOD activity on polyacrylamide gels. We suggest that the distribution of higher SOD in the dark parts of the skin might be related to melanization and to regulate of reactive oxygen species.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1095-8649.1993.tb00585.x
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  • 4
    Digitale Medien
    Digitale Medien
    Measurement of electron densities in electron cyclotron resonance plasmas for etching of III-V semiconductors (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 69 (1991), S. 4206-4210 
    Details
    ISSN: 1089-7550
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: The average electron densities in CH4/H2/Ar and CCl2F2/O2 electron cyclotron resonance discharges typical of those used for etching InP, GaAs, and related materials have been measured approximately 4 cm downstream from the multipolar microwave source as a function of microwave power (50–300 W), additional radio-frequency power (10–50 W), pressure (1–20 mTorr), flow rate (30–90 standard cubic centimeters per minute) and gas composition. At 1 mTorr pressure and 10 W rf, the electron densities (and semiconductor etch rates) increase rapidly with microwave power, from 1.3×1011 cm−3 for 5CH4/17H2/8Ar and 6×1010 cm−3 for 28CCl2F2/2O2 discharges at 50-W microwave power, to 9×1011 cm−3 and 3×1011 cm−3, respectively at 300-W microwave power. At the highest microwave power levels (≥200 W) the InP and GaAs etched surface morphologies are rough due to preferential removal of one of the lattice constituents from each material. The electron densities in both types of discharge show moderate increases with increasing rf power level, pressure or higher Ar or O concentrations.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.348390
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  • 5
    Digitale Medien
    Digitale Medien
    High-sensitive Pockels field sensor with a dielectric mirror (1994)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 65 (1994), S. 2351-2355 
    Details
    ISSN: 1089-7623
    Quelle: AIP Digital Archive
    Thema: Physik , Elektrotechnik, Elektronik, Nachrichtentechnik
    Notizen: The highly sensitive field sensor with a Pockels crystal which was devised by us has been modified by using a light reflection technique. By replacing a metallic mirror with a dielectric mirror which is sputtered on one end face of the Pockels crystal, the new field measuring system has an advantage of precisely measuring the field distribution in the long gap discharge. This is the case when the field sensing part consisting of the Pockels crystal is isolated from the main field measuring system and both are connected to each other with a long light guide cable. Based on our experiments, we found that the measurable minimum field strength in the long gap discharge is 2 V/cm with the accuracy of 16 dB and 0.2 V/cm with the critical accuracy of 0 dB. Furthermore, we point out that the size of the field sensing part can be reduced down to 1 mm in diameter by using a dielectric mirror and a light guide cable.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.1144687
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  • 6
    Digitale Medien
    Digitale Medien
    Optical high-sensitive field sensor using a Pockels crystal (1992)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 63 (1992), S. 5582-5585 
    Details
    ISSN: 1089-7623
    Quelle: AIP Digital Archive
    Thema: Physik , Elektrotechnik, Elektronik, Nachrichtentechnik
    Notizen: The sensitivity of an optical field sensor with a Pockels crystal of LiNbO3 for measuring a field distribution in a long-gap discharge has been much improved by using an intensity difference method with an intensity-modulated laser beam. The signal-to-noise ratio (S/N) is also improved by 37 dB from that without the above-mentioned method. The resultant sensitivity of the new field measuring system is 100 times higher than that of the previous one. Finally, it is possible to measure an electric field down to 7.5 V/cm in the long-gap discharge with high accuracy corresponding to the S/N ratio of 20 dB and 1.5 V/cm with the accuracy of 6.0 dB.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.1143385
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  • 7
    Digitale Medien
    Digitale Medien
    Diffusion barrier effects of transition metals for Cu/M/Si multilayers (M=Cr, Ti, Nb, Mo, Ta, W) (1994)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 64 (1994), S. 1511-1513 
    Details
    ISSN: 1077-3118
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: In order to find appropriate diffusion barrier materials for Cu, the diffusion of Cu into Si through various barrier metals M (M=Cr, Ti, Nb, Mo, Ta, W) was investigated. The behavior of Cu in Cu/M/Si multilayers was measured after annealing using x-ray diffraction analysis, secondary ion mass spectroscopy, Rutherford backscattering spectroscopy, and electric resistance change. Only Cu/Ta/Si and Cu/W/Si multilayers retained their multilayer structures after annealing at 600 °C×1 h in H2 without resistivity increases. Multilayers of the other metals did not retain their structures after the same annealing condition. This difference in the barrier properties of the transition metals appeared to be related to the metal-Cu binary phase diagrams and their self-diffusion coefficients.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.111875
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  • 8
    Digitale Medien
    Digitale Medien
    Serial change of iodine-123 metaiodobenzylguanidine (MIBG) myocardial concentration in patients with dilated cardiomyopathy (1992)
    Springer
    European journal of nuclear medicine 19 (1992), S. 265-270 
    Details
    ISSN: 1619-7089
    Schlagwort(e): Dilated cardiomyopathy (DCM) ; Myocardial scintigraphy ; 123I-Metaiodobenzylguanidine (MIBG)
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Serial change of the metaiodobenzylguanidine iodine-123 (123I-MIBG) myocardial concentration was investigated in patients with dilated cardiomyopathy (DCM). Eight DCM patients and 6 control subjects were examined. After the injection of thallium-201 and 123I-MIBG, planar chest images were obtained simultaneously for both tracers in every 30–60 min over 5 h. Serial changes of myocardial uptake ratio (MUR) were compared for both tracers. In DCM, the initial MUR of 123I-MIBG did not differ significantly from that of the controls. The washout of 123I-MIBG from the myocardium, however, was significantly increased in DCM. In particular, the decrease in the early phase (15–45 min) was significantly larger in DCM than in the controls (21.2%±7.5% vs. 5.3%±4.0%, P 〈0.01), showing a significant negative correlation with the left ventricular ejection fraction (r = −0.72 P 〈 0.05). For 201TI, neither the initial MUR nor the washout rate different significantly between the two. Thus, an early rapid decrease of the 123I-MIBG myocardial concentration might characterize DCM and reflect the severity of this disease.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00175140
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  • 9
    Digitale Medien
    Digitale Medien
    Reaction of glyoxal and glyoxal/glycol with wood (1993)
    Springer
    Wood science and technology 28 (1993), S. 23-33 
    Details
    ISSN: 1432-5225
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft , Maschinenbau
    Notizen: Summary In terms of the problem of formaldehyde-releasing, glyoxal is one of the interesting dialdehydes as a crosslinking agent for wood. In the present report, the reaction of glyoxal and glyoxal/glycol with the wood of Japanese ash (Fraxinus mandshurica Rupr. var. japonica Maxim.) has been studied. Particular attention to the structure of the product (after treatment with glyoxal/glycol (glycol: ethylene glycol, diethylene glycol, triethylene glycol)) was made and the formation of crosslinking has been discussed. Reaction of only glyoxal with wood showed little reactivity, while that of glyoxal/glycol gave high weight increases for each glycol. The appropriate condition was at 100° to 130°C for 2 hrs. It was found that the product forms network structures, at least within itself. The crosslinking between the product and wood components, however, could not be confirmed, although it was assumed that the product was structurally linked to wood by its reactive sites.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00193873
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  • 10
    Digitale Medien
    Digitale Medien
    Non-steady state water adsorption of wood (1994)
    Springer
    Wood science and technology 28 (1994), S. 450-456 
    Details
    ISSN: 1432-5225
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft , Maschinenbau
    Notizen: Summary The validity of the following equation of water adsorption into wood substance which was derived in the previous report, is examined: d(δW)/dt = k0(1 − exp(-k1/t))δW(l − δW), which can approximately be written as: d(δW)/d(logt) = rδW(l − δW), where δW is moisture content; t is time (t 〉 0); k0, k1 and r are constants. After measuring dimensional change with change in time under various relative humidities, the change of moisture content was indirectly calculated from the proportional relationship between dimensional change and moisture content. It was found that the theoretical equation satisfactorily agreed with the experimental results. These results lead to the conclusion that the equation was valid. Furthermore, the properties of the equation, whose constants are determined from experimental results, is discussed. The rate of water adsorption of wood shows interesting and systematical properties, especially near relative humidities corresponding to the fiber-saturation point.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00225464
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